stilwell



(No Model.)

C. B. STILWBLL. PAPER BAG MACHINERY.

No. 410,123. Patented Aug. 27 1889.

WIE u "fr 'q Inventor UNITED STATES PATENT OEEICE.-

CHARLES B. STILIVELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THEUNION PAPER BAG MACHINE COMPANY, OF SAME PLACE.

PAPER-BAG MACHINERY.

SPECIFICATION forming part of Letters Patent No. 410,123, dated August27, 1889.

Application filed January 26, 1889. Serial No.297,599. (No modelJ' Toall whom, it may concern,.-

Bc it known that I, CHARLES B. STILWELL, of .the city and county ofPhiladelphia, State of Pennsylvania, have invented a new and usefulImprovement in Paper-Bag Machin ery, of which the following is a trueand exact description, reference being had to the accompanying drawings,which form a part of this specification.

My invention relates to mechanism for forming a bellows-folded tube froma web of paper and severing it into bag-blanks, and the novel featuresof my invention are heref inafter clearly set forth in the claims.

The mechanism will best be described in connection with the drawings, inwhich it is illustrated, and in which- Figure 1 is a sectional elevationof my device, taken along its median line. Fig. 2 is a plan view; Figs.3, 4f, 5, and 6, views of the web in different stages of its formationinto a tube; Figs. 7, 8, 9, and 10, similar views showing the formationof a tube where the paper is introduced beneath the curved spreaders Jin a somewhat diferent way; and

'Fig l1 is a section through the spreader J,

which acts on the pasted edge of the web, showing a device I haveprovided it with to prevent contact of the paste with the spreader.

A is a roll of paper; B B', guide-rolls; C, a paste-roll; C', Vapaste-trough; D, the web of paper.

The web of paper is led through mechanism for forming it into abellows-folded tube, which, as shown in the drawings, consists offormerplates E E2, sustained on a standard E; tucking-Wheels F F, forforming the bel-l lows fold; fingers G G, for folding over the edges ofthe web; guide disks or wheels lI I-I, and creasing-rolls I I', allthese parts, as shown, being of a well known construction and forming noessential part of the present invention, being given simply as anexample of folding mechanism.

J J are curvedspreading-plates, which are situated at the end of thefolding mechanism and the ends J 2 of which are introduced eitherbeneath the folds d CZ with the effect of open# ing the folded web intothe form shown in Fig. 5, or above the folds el cl2, in which case 5othe. web is opened into the form shown in Fig. 9. The folds d CZ, d d',and d2 d2 are of course formed in the forming mechanism which precedesthe curved opening-plates, the lines of fold in each case being the sameand the only difference being made by the position of the ends of theopen places in the folds of the web.

II is a cutter, the edges of which are, Where the web is opened into theform shown in Fig. 6o

5, formed with a central projection 7o and recessed sides k 7s, so as tocut a lip d6 in the under side of the folded tube and sever theremaining sides on the line (Z7. (See Fig. 6.) Where, however, the tubeis opened, as in Fig. 9, the edge of the knife should be reversed inform, the center being recessed and the sides projecting, as isindicated by the line O, Fig. 9. This results in cutting the lip d* onthe upper side of the tube and severingV the 7o remaining sides on theline (Z5. (See Fig. 10.)

j, Figs. 2 and 11, indicates a slight projecting rib on the curved'opening plate J, which comes in contact with the pasted edge of theblank. of paste out of contact with the plate, whic kit does, as isindicated in Fig. 11.

L is a striker acting in connection with the v knife K in the usual way.

P P are feed-rolls, which feed the severed 8o and partially-openedblanks forward; J J, curved closing-plates which operate in the reversemanner to the plates J J, folding the opened blank back again into theform of a tube, as is clearly shown in the drawings.

Any mechanism for completing the bags may of course be used inconnection with my above-described device.

Having now described my invention, what `I claim as new, and desire tosecure by Let 9o ters Patent, is-

l. In a paper-bag machine, the combination, with mechanism for forming aweb of paper into a bellows-folded tube, of curved spreaders J J, forspreading open the folded 95 tube, a knife K, and striker L, forsevering the Its function is to hold the line opened tube, and curvedclosing-plates J J', tube, and a rib j, founed on the side of the forrefolding the opened end of the bla-nk, all spreader J, against whichthe pasted edge of substantiallyas and for the purpose specified. thepaper rests.

2. In a papebag machine, the combina- CHAS. STILVVELL. 5 tion, withmechanism for forming a, web. Vitnesses:

of paper into a bellows-fo1ded tube, of curved WILLIAM H. DOERING,

Spreaders J J, for spreading open the folded LISLE STOKES.

